EVF displays like that are a dead end, IMHO, at least for the near future. They waste too much electricity and do too poor a job with manual focus. And they're limited in resolution to the dots on the display rather than to your eye and lens's ability to resolve detail.

That being said, zebra striping is something that I do miss with my dSLR, but it's not worth the loss of battery life and the increase heat that generates on the sensor.

I know that a lot of folks think things are going towards EVFs, and to an extent that's true. My 7D has an LCD overlay for things like the focus points and grid, but it's a much, much lower energy version that relays on real optics to show me what I'm seeing and I think that's much more likely to be the end game than the EVFs we see now.